21390400

素因数分解:

$2^6\times 5^2\times {\mathrm{29}}^1\times {\mathrm{461}}^1$

素因数の和:512

約数の個数: 84

約数和(自身を含む): 54566820

約数和(自身を除く): 33176420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 29, 32, 40, 50, 58, 64, 80, 100, 116, 145, 160, 200, 232, 290, 320, 400, 461, 464, 580, 725, 800, 922, 928, 1160, 1450, 1600, 1844, 1856, 2305, 2320, 2900, 3688, 4610, 4640, 5800, 7376, 9220, 9280, 11525, 11600, 13369, 14752, 18440, 23050, 23200, 26738, 29504, 36880, 46100, 46400, 53476, 66845, 73760, 92200, 106952, 133690, 147520, 184400, 213904, 267380, 334225, 368800, 427808, 534760, 668450, 737600, 855616, 1069520, 1336900, 2139040, 2673800, 4278080, 5347600, 10695200, 21390400]

約数ペア:

[(1, 21390400), (2, 10695200), (4, 5347600), (5, 4278080), (8, 2673800), (10, 2139040), (16, 1336900), (20, 1069520), (25, 855616), (29, 737600), (32, 668450), (40, 534760), (50, 427808), (58, 368800), (64, 334225), (80, 267380), (100, 213904), (116, 184400), (145, 147520), (160, 133690), (200, 106952), (232, 92200), (290, 73760), (320, 66845), (400, 53476), (461, 46400), (464, 46100), (580, 36880), (725, 29504), (800, 26738), (922, 23200), (928, 23050), (1160, 18440), (1450, 14752), (1600, 13369), (1844, 11600), (1856, 11525), (2305, 9280), (2320, 9220), (2900, 7376), (3688, 5800), (4610, 4640)]